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Wireless Networks

The diagnostic system is able to check the RF coverage, and to acquire functional parameters for commercial wireless technology (GSM and DCS) and for GSM-R service quality. Additionally, the system checks the speech quality degradation occurring through the telephony network and evaluates the packet switching data
transmission performances (GPRS).

The system is made up of the following components:

SYNC BOARD, sending synchronization signal to a scanner receiver
Train Antennas
Software module with PESQ algorithm, evaluating the quality of voice signal
Voice response module
Digital acquisition board, necessary to manage the synchronization pulses
Scanner RF receivers
Mobile stations, acquiring the layer 3 messages and the related parameter
Acquisition and elaboration unit AU\PU.

	GSM-R: Global Standard for Mobile Communications Rail
	In 1993, the worldwide organization of railway cooperation (UIC, Union Internationale des Chemins de fer) decided on a new system of railway communication. The decision was made to not to use TETRA for this task but to use a slightly modified GSM 900 technology. 32 railway operators from 24 European countries agreed in the EIRENE (European Integrated Railway radio Enhanced NEtwork) MoU to roll out GSM-R (-R stands for Railway) networks. GSM-R was finally specified 1999 by ETSI and in 2000 by EIRENE.